Transene have good selective etchant. Google transene etchant. Regards, Gil Zilber Elta Systems -------- הודעה מקורית -------- מאת: "Grossmann, Günter" <[log in to unmask]> תאריך: 06/02/2015 10:27 (GMT+02:00) אל: [log in to unmask] נושא: [TN] Stripping of gold Hi all I need to strip gold from Ni on solder pads but Aqua Regina eats away the nickel as well. Has anyone got the formula for a chemical solution? Best regards Günter ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ The information contained in this communication is proprietary to Israel Aerospace Industries Ltd. and/or third parties, may contain confidential or privileged information, and is intended only for the use of the intended addressee thereof. If you are not the intended addressee, please be aware that any use, disclosure, distribution and/or copying of this communication is strictly prohibited. If you receive this communication in error, please notify the sender immediately and delete it from your computer. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________